package homeWork;

public class homeWork5 {
    public static void main (String[] args){
        double result = caculate();
        System.out.println("级数的和为：" + result);
    }
    public static double caculate(){
        double sum = 0;
        for (int i = 1; i <= 100; i++) {
            if (i % 2 == 0){
                sum -= 1.0/i;
            }else{
                sum += 1.0/i;
            }
        }
        return sum;
    }
}
